I bought a Groupon for Hapina Grill in Cedarhurst on January 3. On January 15, I got an email from Groupon saying that the restaurant had closed. I contacted them and asked how to get my money back. They told me I can trade it in for another Groupon, but there's nothing else that I want. It's possible that Hapina closed even before I bought the Groupon. Suggestions on how to get a refund?